Preheat oven to 350°F.
In a large bowl, combine flour, brown sugar and butter together.
Rub mixture with clean hands until combined and crumbly. Press into a greased 9-inch square baking pan.
Bake for 5 minutes. Set aside to cool.
In a small saucepan, bring sugar and maple syrup to a boil over medium-high heat.
Remove from heat immediately once it starts to boil. Cool slightly.
In a large bowl, add beaten eggs. Pour syrup mixture into eggs, stirring constantly. Stir in remaining Ingredient
Pour syrup mixture over partially baked crust.
Bake at 450°F for 10 minutes.
Reduce heat to 350°F and bake for 20 minutes longer.
Cool completely before cutting into squares